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Severe Service Zero-Leakage Exact Flow Control Severe Service Control Valves Xactrol®
Severe Service Zero-Leakage Exact Flow Control
Severe Service Control ValvesXactrol®
2Xactrol®
©2014 ValvTechnologies, Inc. All rights reserved.
ValvTechnologies Xactrol® severe service control valves are engineered for applications where minimum flow and relatively high differential pressures are required. They provide “exact” flow control solution every time, from minimum or normal control to full rangeability across a wide range of pressure drops and conditions.
The Xactrol® product group unites Valvtechnologies’ zero-leakage technology with special designs that allow rotary modulating control. From the Mark I design that features a characterized upstream seat, to the Mark III’s precision engineered stacked disks, the Xactrol® allows the customer to combine precise flow control with tight shutoff.
Xactrol®Severe Service Control Valve ANSI/ASME 150-4500#, 1/2 - 36”
Xactrol® - Engineered for precision.
Xactrol®
©2014 ValvTechnologies, Inc. All rights reserved. 3
The Xactrol® control valve is typically used in applications where minimum flow and relatively high differential pressures are encountered:
• Power: Continuous blowdown, boiler feedpump recirculating bypass, main steam start-up vent• Process: Pump outlet flow control, tank level control valve• Mining: Make-up water control, dilution water control, process water isolation and control
Common Configurations
Applications
Mark I Mark II Mark III1/2” - 36”, ANSI/ASME 150 - 4500 1/2” - 36”, ANSI/ASME 150 - 4500 1/2” - 36”, ANSI/ASME 150 - 4500
Designed for minimum/normal flow control conditions
Designed for minimum/normal flow control conditions
Designed for minimum/normal flow control conditions
Variety of characterized upstream seats available
Variety of characterized upstream seats available
Variety of characterized upstream seats available
Engineered to meet your control needs Engineered to meet your control needs Engineered to meet your control needs
Zero-leakage Zero-leakage Zero-leakage
Includes a second flow port designed to handle continuous minimum flow conditions
For applications requiring very high pressure drops
Includes a series of upstream pressure reducing plates
For the most difficult control applications
Available Designs
Xactrol® - Tandem arrangement with automated control valves
Xactrol® - Tandem arrangement with manual isolation valves
Superior failure resistance and reliability.
4Xactrol®
©2014 ValvTechnologies, Inc. All rights reserved.
From simple minimum or normal flow control to full range-ability over a wide range of pressure drops and conditions, we have the solution for you.
Our Xactrol® Mark I is designed for minimum or normal flow control conditions as is experienced in a large number of flow control applications. The Mark I comes with a vari-ety of characterized upstream seats, which can be specifi-cally engineered/designed to suit your control needs.
The next step is the Mark II (see page 3). In addition to the normal flow conditions, the Mark II has a second flow port through the ball which is designed to handle your continu-ous minimum flow conditions.
For applications where very high-pressure drops are required, we offer the Mark III (see page 3), which has a series of upstream pressure reducing plates. The plates will successfully reduce, stage by stage, the pressure in the system, which when combined with the full rangeability of control through the control ball and seat, will solve the toughest of control applications.
Regardless of the complexity of your control application, each of our customized engineered solutions will be cali-brated and tested on our state-of-the-art flow test loop.
Each valve package will come complete with its own flow test curve to ensure complete reliability. The above graph is from an actual flow loop test as supplied to the customer.
4” x 1/2” Control ValveXactrol® C5C17SB7SC (XX) (XX) / MARK II
Xactrol®
©2014 ValvTechnologies, Inc. All rights reserved. 5
Technical SpecificationsControl Signal 2 wire 4 - 20 mA, 18-24V
Feedback Signal 4-20 mA, passive transmitter
Operating Temp Range 21.6 -183.6 F°
Hysteresis 0.8%
Linearity <1%
Sensitivity 0.4%
Air Supply 0 - 100 psi (0 - 7 Bar)
Air Consumption @0
Air Flow 50 l/min
Air Filtering <30 um
Air Entry 1/4” NPT
Electrical Entry 2 x M20, 1.5 mm2
Dimensions L x B x H = 5.9 X 5.9 X 3.94”
Housing Stainless steel 316 ss
Ingress Protection IP 65
Weight 4.185 lbs.
Maximum Rotation 300°
Intelligent Valve ControllerSpecificationsEPP100 SR EEx “ ib” for single acting actuatorsEPP100 DA EEx “ ib” for double acting actuators
2-Wire Current Loop ControlThe control signal is a “real” 2-wire 4-20 mA current loop, with power and control signal in the same loop. If loop failure occurs, then the valve returns to failsafe position.
4-20 mA Feedback Signal
ActuatorsController available for double acting and spring return pneumatic actuators.
Auto CalibrationThe self calibration routine sets all the basic settings and measures the actuator size for optimum valve control and fast feedback loop.
Low Air ConsumptionAir is only used when it is needed providing significant savings in instru-ment air costs.
Valve Flow CharacteristicsChoice of integrated standard valve curve characteristics for ball control valves (equal percentage).
Manual SetpointIn service situations the setpoint can be manually chosen from the user menu.
Four Button Control PanelThe four button control panel makes each command sequence simple and easy to follow.
Mechanical StabilityThe compact design with few moving parts is insensitive to environmental influences providing a high degree of immunity from failure.
Digital CommunicationUp to 32 units can be linked via RS 485 communication interface to a PC or laptop computer for configuration and remote control.
Ditital LCD DisplayThe two lines of 16 digit alphanumeric display.
Power Failure OptionsIf power fails the controller will close the actuator. When power returns the controller will restart and regulate again with no loss of data and configuration.
Diagnostic AlarmsInternal diagnostic alarm is activated in the event of air failure or if the control valve does not operate and the local LCD display will show an error message.
6Xactrol®
©2014 ValvTechnologies, Inc. All rights reserved.
Upstream pressure reducing plates are stacked so maximum flow (pressure) travels through plate A (Fig. 3) then splits and pressure continues to be reduced as flow proceeds to follow tortuous 90° paths through succeeding holes in various stacked pressure reducing plates. See plates B, C & D (Fig. 3).
Multi-stage pressure reducing plates are positioned such that the diverging streams through the various plates actually collide with each other – greatly reducing their energy – before entering the next plate (Fig. 1).
Pressure reduction is at the upstream side of the valve, thus reducing the torque required to open and close the valve.
Downstream sealing face is protected from flow, thus offering repeatable zero-leakage.
Dynamics of a Mark III Xactrol® Control Valve
Figure 1
Figure 2
Figure 3
Xactrol®
©2014 ValvTechnologies, Inc. All rights reserved. 7
ValvTechnologies is committed to excellence in the design, manufacturing, service and testing of its Xactrol® severe service control valves, while providing control solu-tions to meet and exceed customer expectations.
Xactrol® Features and Benefits
Xactrol® Key Performance Features and BenefitsFeatures Benefits
Superior failure resistance and reliability Enhanced process safety
Constant packing load maintained with four-stud, live-loaded packing assembly
Increased safety, enhanced process efficiency, environmentally friendly
Custom engineered Process optimization
Consistent flow-rates Reduced fluid costs
Control trim made from extremely hard components
Reduced wear, increased life of the valve
Zero-leakage Enhanced process safety, increased efficiency
Resistance to small entrained solids Lower maintenance costs, increased reliability
Precise flow control. Zero-leakage. All in a single unit.
Severe Service Control ValvesXactrol®
Worldwide Office Locations
PeruLima
BrazilSão Paulo
United [email protected]
AustraliaBrisbane
ChinaShanghai
ChinaChengdu
ChinaBeijing
Eastern EuropeWarsaw
Middle EastDubai
IndiaChennai
Japan/KoreaSeoul
SpainMadrid
Headquarters & ManufacturingValvTechnologies, Inc.5904 Bingle RoadHouston, Texas 77092 U.S.A.Telephone +1 713 860 0400Fax +1 713 860 [email protected]
To locate a distributor or satellite office near you, visit us online at:www.valv.com
To contact sales anywhere in the world, email [email protected]
©2014 ValvTechnologies, Inc. All rights reserved. 304_Xactrol®. March 2014.
ValvTechnologies, Inc. is a global leader in the design & manufacturing of flow control devices. Founded in 1987 & headquartered in Houston, Texas, ValvTechnologies remains focused on helping customers meet their daily production and process challenges safely and efficiently.
Having built a global reputation for superior quality & dependability across many industries, ValvTechnologies’ products are designed to exceed both the standard & most sophisticated, severe-service processes application requirements. ValvTechnologies meets the demands for total flow control solutions, whether one valve at a time, or system-wide.
Bringing together the best people and the latest in tech-nological design and manufacturing processes, ValvTech-nologies has created an atmosphere where quality and dependability are built into every product, start to finish.
